private int getDceReferent(final Object obj) {
        Entry e;

        if (referents == null) {
            referents = new HashMap();
            referent = 1;
        }

        e = (Entry) referents.get(obj);
        if (e == null) {
            e = new Entry();
            e.referent = referent++;
            e.obj = obj;
            referents.put(obj, e);
        }

     *
     * @param obj The object to create a string representation for, may be <code>null</code>.
     * @return The string representation, never <code>null</code>.
     */
    private String toString(Object obj) {
        String str;
        if (obj != null && obj.getClass().isArray()) {
            int n = Array.getLength(obj);
            StringBuilder buf = new StringBuilder(256);

        return (T) component;
    }

    /**
     * Wraps an object instance into a pooled object.
     *
     * @param obj The object to wrap
     * @return A PooledObject wrapping the given object
     */
    @Override
    public PooledObject<T> wrap(final T obj) {
        return new DefaultPooledObject<>(obj);
    }

    /**
     * Destroys a pooled object and notifies the destroy listener if set.

				BucketName: bucket,
				Object: ObjectInfo{
					Name:      dobj.ObjectName,
					VersionID: dobj.VersionID,
				},
				UserAgent: "Internal: [ILM-Expiry]",
				Host:      globalLocalNodeName,
			}
			if errs[i] != nil {
				evArgs.RespElements = map[string]string{
					"error": fmt.Sprintf("failed to delete %s(%s), with error %v", dobj.ObjectName, dobj.VersionID, errs[i]),
				}
			}
			sendEvent(evArgs)
		}

		expectedError error
	}{
		// Cases with invalid bucket name.
		0: {bucketName: ".test", objName: "obj", inputData: []byte(""), expectedError: BucketNameInvalid{Bucket: ".test"}},
		1: {bucketName: "------", objName: "obj", inputData: []byte(""), expectedError: BucketNameInvalid{Bucket: "------"}},
		2: {
			bucketName: "$this-is-not-valid-too", objName: "obj", inputData: []byte(""),
			expectedError: BucketNameInvalid{Bucket: "$this-is-not-valid-too"},
		},

  /** Constructor for use by subclasses. */
  public AbstractGraph() {}

  @Override
  public final boolean equals(@Nullable Object obj) {
    if (obj == this) {
      return true;
    }
    if (!(obj instanceof Graph)) {
      return false;
    }
    Graph<?> other = (Graph<?>) obj;

    return isDirected() == other.isDirected()
        && nodes().equals(other.nodes())
        && edges().equals(other.edges());
  }

        int hash = 17;
        hash = hash * 31 + toInvert.hashCode();
        return hash;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }

        if (obj instanceof InversionArtifactFilter other) {
            return toInvert.equals(other.toInvert);
        } else {
            return false;
        }
    }

    @Override
    public boolean equals(final Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        @SuppressWarnings("unchecked")
        final Pair<T1, T2> other = (Pair<T1, T2>) obj;
        if (first == null) {

            }
        }
        return true;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null || getClass() != obj.getClass()) {
            return false;
        }
        Smb2LeaseKey other = (Smb2LeaseKey) obj;
        return Arrays.equals(key, other.key);
    }

    @Override
    public int hashCode() {

    }

    @Override
    public boolean equals(final Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null || getClass() != obj.getClass()) {
            return false;
        }
        final StopwordsItem other = (StopwordsItem) obj;
        return java.util.Objects.equals(input, other.input);
    }

    @Override